Physics Group - I (3110011) MCQs

MCQs of Properties of Matter

Showing 11 to 20 out of 32 Questions
1 2 3 4
11.
Young's modulus of a wire is given by
(a) m g π r2 ∆L
(b) m g Lπ r2 ∆L
(c) m g L π r2 
(d) m g L π  ∆L
Answer:

Option (b)

12.
The reciprocal of Bulk modulus gives
(a) compressibility
(b) inverse bulk modulus
(c) elasticity
(d) plasticity
Answer:

Option (a)

13.
On removal of deforming force, if a material regains its original state, it is called
(a) perfectly plastic
(b) perfectly elastic
(c) rigid body
(d) residual material
Answer:

Option (b)

14.
Poisson's ratio mainly depends upon
(a) length of the material
(b) thickness of the material
(c) shape of the material
(d) nature of the material
Answer:

Option (d)

15.
In most materials, value of Poisson's ratio is nearly
(a) 1
(b) 0.9
(c) 0.2 - 0.4
(d) 0.08
Answer:

Option (c)

16.
For a cubic element, its Young's modulus and bulk modulus are related in a manner
(a) B=Y3(1-2μ)
(b) B=2Y3(1-2μ)
(c) B=2Y(1-2μ)
(d) B=Y (1-2μ)
Answer:

Option (a)

17.
For twisting couple on a wire, considering usual notations, the equation of its shearing strain will be
(a) ϕ =π  r2 θl
(b) ϕ =r θl
(c) ϕ =π  r2 θ2 l
(d) ϕ =π 2 r θl
Answer:

Option (b)

18.
For a wire, its twisting couple per unit angular twist is given by
(a) C =12π  a2 ηl
(b) C =12π  a2 η2l2
(c) C =12π  a2 η2l
(d) C =12π  a4 ηl
Answer:

Option (d)

19.
Torsional pendulum is used to determine the __________ and __________ of a given body
(a) torsional rigidity, number of oscillations per second
(b) moment of inertia, torsional rigidity
(c) moment of inertia, Young's modulus of wire
(d) moment of inertia, shear modulus of wire
Answer:

Option (b)

20.
For a torsional pendulum, which of the following equation the correct behavior ?
(a) I d2θdt2 > -C θ
(b) I d2θdt2  -C θ = 0
(c) I d2θdt2 < -C θ
(d) I d2θdt2 = -C θ
Answer:

Option (d)

Showing 11 to 20 out of 32 Questions
1 2 3 4